setup_firebase_app_mocks.dart

// ignore_for_file: depend_on_referenced_packages

import 'package:firebase_core_platform_interface/firebase_core_platform_interface.dart';
import 'package:flutter_test/flutter_test.dart';

// https://github.com/firebase/flutterfire/issues/3311#issuecomment-721414988
void setupFirebaseAppMocks() {
  TestWidgetsFlutterBinding.ensureInitialized();

  MethodChannelFirebase.channel.setMockMethodCallHandler(
    (call) async {
      if (call.method == 'Firebase#initializeCore') {
        return [
          {
            'name': defaultFirebaseAppName,
            'options': {
              'apiKey': '123',
              'appId': '123',
              'messagingSenderId': '123',
              'projectId': '123',
            },
            'pluginConstants': <dynamic, dynamic>{},
          }
        ];
      }

      if (call.method == 'Firebase#initializeApp') {
        final args = call.arguments as Map<String, dynamic>;
        return {
          'name': args['appName'],
          'options': args['options'],
          'pluginConstants': <dynamic, dynamic>{},
        };
      }

      return null;
    },
  );
}